The Gruffalo & Friends Clubhouse gift cards can't be used for on-site payments. They can only be used to pre-book this attraction through the Merlin Gift Card website (merlingiftcard.co.uk). Apply your gift card at check out as a credit/debit Mastercard. You can only use one gift card per online transaction, and it can't be used for part payment. The gift card must cover the entire purchase amount.